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Related Concept Videos

EPS and iPS Cells in Disease Research01:21

EPS and iPS Cells in Disease Research

Embryonic and induced pluripotent stem cells are excellent models for disease research because of their ability to self-renew and differentiate into most cell types. Somatic cells from a patient are isolated and reprogrammed into induced pluripotent stem cells or iPSCs. These iPSCs are later differentiated into the desired cell type, which mirrors the diseased cell of the patient. In this way, disease models have been created for investigating diseases such as Down syndrome, type I diabetes,...
iPS Cell Differentiation01:22

iPS Cell Differentiation

The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.

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Related Experiment Video

Updated: May 15, 2026

Generation of Induced Pluripotent Stem Cells from Turner Syndrome (45XO) Fetal Cells for Downstream Modelling of Neurological Deficits Associated with the Syndrome
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Modeling Timothy syndrome with iPS cells.

Masayuki Yazawa1, Ricardo E Dolmetsch

  • 1Department of Neurobiology, Stanford University School of Medicine, Stanford, CA, USA.

Journal of Cardiovascular Translational Research
|January 10, 2013
PubMed
Summary
This summary is machine-generated.

Researchers created patient-specific stem cell-derived cardiomyocytes to study Timothy syndrome (TS) cardiac arrhythmias. Roscovitine drug successfully rescued cellular defects, offering a new platform for arrhythmia research and drug discovery.

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Last Updated: May 15, 2026

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Published on: May 14, 2012

Area of Science:

  • Cardiology
  • Genetics
  • Stem Cell Biology

Background:

  • Genetic mutations in ion channels are linked to cardiac arrhythmias, but their pathophysiological mechanisms remain unclear.
  • Studying arrhythmias using human cardiomyocytes is challenging, hindering disease mechanism research and drug development.

Purpose of the Study:

  • To develop a human cellular model for studying cardiac arrhythmias associated with Timothy syndrome (TS).
  • To investigate the cellular and electrical defects in TS cardiomyocytes.
  • To identify potential therapeutic agents for TS-related cardiac arrhythmias.

Main Methods:

  • Generation of human-induced pluripotent stem cells (hiPSCs) from individuals with Timothy syndrome (TS).
  • Differentiation of hiPSCs into ventricular-like cardiomyocytes.
  • Utilizing live cell imaging and electrophysiological studies to assess cellular function.
  • Testing candidate drugs, including roscovitine, for their ability to rescue TS cardiomyocyte phenotypes.

Main Results:

  • TS ventricular-like cardiomyocytes displayed significant deficits in contraction, electrical signaling, and calcium handling.
  • Roscovitine demonstrated efficacy in rescuing the observed cellular and electrophysiological abnormalities in TS cardiomyocytes.
  • The developed hiPSC-derived cardiomyocyte model accurately recapitulates key features of TS cardiac dysfunction.

Conclusions:

  • Human iPSC-derived cardiomyocytes provide a valuable platform for elucidating the pathophysiology of genetic cardiac arrhythmias like TS.
  • This model facilitates the screening of potential therapeutic compounds for cardiac arrhythmia treatment.
  • The findings highlight roscovitine as a potential therapeutic candidate for TS-related cardiac arrhythmias.